Class (Less than) | Cumulative frequency |
10 | 12 |
20 | 25 |
30 | 64 |
40 | 84 |
50 | 96 |
60 | 120 |
70 | 192 |
80 | 256 |
A) 64.4
B) 61.1
C) 62.2
D) None of these
Correct Answer: B
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